This is a dumbed down version of OBP since with some projections you don't get all the stats you need. I know it's not accurate, but it's not like projections are completely accurate anyway.

What I'm trying to figure out is walks. The simple formula is (Hits + BBs)/(ABs + BBs) = OBP. With one set of projectiona I have, they give me the Hits, ABs, and OBP, and I want to calculate BBs.

I've played with the formula, but it's been 20 years since I took math in high school and apparently I am more rusty than I thought. Can some give me the formula to figure out the BBs in this case knowing the other values?

He's actually drawn 591 BB, but since OBP is rounded to the thousandths place, it's going to be an approximation. Either that or me not having my coffee this morning is killing my brain.

He's actually drawn 591 BB, but since OBP is rounded to the thousandths place, it's going to be an approximation. Either that or me not having my coffee this morning is killing my brain.

Yep but the problem is the BBs in the middle of the parenthesis, I won't have the value for that. And I tried to carry it a bit further

BB = OBP * AB + OBP * BB - H then BB - OBP * BB = OBP * AB - H then BB - BB = OBP * AB - H / OBP

That's screwed up, but that's just me

Thanks for the help tho

Last edited by Broncmet724 on Fri Mar 14, 2008 12:05 pm, edited 1 time in total.

BB = (.354*5113 - 1433)/1 - .354 BB = (1810.002 - 1433)/.646 BB = 377.002/.646 BB = 583.5944272 ... which still isn't our desired 591, but again, I imagine that's likely due to the rounded OBP we used. His actual OBP is 0.35483871

Using that extended OBP, we get... BB = 590.2327 EDIT: The discrepancy can be attributed to the calculator I'm using rounding itself after it runs out of places. I'm using a scientific and not a graphing.

bigh0rt wrote:Duh, I forgot to finish the equation

BB = (OBP*AB - H)/1 - OBP

should be the correct formula.

Using Beltran, again, we get...

BB = (.354*5113 - 1433)/1 - .354 BB = (1810.002 - 1433)/.646 BB = 377.002/.646 BB = 583.5944272 ... which still isn't our desired 591, but again, I imagine that's likely due to the rounded OBP we used. His actual OBP is 0.35483871

Using that extended OBP, we get... BB = 590.2327 EDIT: The discrepancy can be attributed to the calculator I'm using rounding itself after it runs out of places. I'm using a scientific and not a graphing.

That's the same equation I gave him initially, just with the top and bottom multiplied by -1. It looks cleaner w/ yours though with the positive numbers.